I'm not T4 but have a certain number of shoes made by both. The Bestettis have tighter waist and in some models a somewhat aggressive last (for lack of a better image) which I quite like, The leathers of both are great even though my Bestettis tend to have more pronounced creasing. However what I particularly appreciate about Meccariello is that he is very very open in modifying and testing on his shoes

just to reply to the question on why pay $1700 for SCs rather than bespoke, firts of all going bespoke requires you to have the bespoke maker either in your back yard or in a city where you travel often as to get the fittings and second bespoke doesn't always mean better....